"""Single entry point: build Application, run HTTP server + polling. Migrations run in Docker entrypoint."""

import asyncio
import json
import logging
import threading
import urllib.request

import config
from telegram.ext import ApplicationBuilder

from handlers import register_handlers

logging.basicConfig(
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
    level=logging.INFO,
)
logger = logging.getLogger(__name__)


def _set_default_menu_button_webapp() -> None:
    """Set the bot's default menu button to Web App so Telegram sends tgWebAppData when users open the app from the menu."""
    if not (config.MINI_APP_BASE_URL and config.BOT_TOKEN):
        return
    menu_url = (config.MINI_APP_BASE_URL.rstrip("/") + "/app/").strip()
    if not menu_url.startswith("https://"):
        return
    payload = {
        "menu_button": {
            "type": "web_app",
            "text": "Календарь",
            "web_app": {"url": menu_url},
        }
    }
    req = urllib.request.Request(
        f"https://api.telegram.org/bot{config.BOT_TOKEN}/setChatMenuButton",
        data=json.dumps(payload).encode(),
        headers={"Content-Type": "application/json"},
        method="POST",
    )
    try:
        with urllib.request.urlopen(req, timeout=10) as resp:
            if resp.status == 200:
                logger.info("Default menu button set to Web App: %s", menu_url)
            else:
                logger.warning("setChatMenuButton returned %s", resp.status)
    except Exception as e:
        logger.warning("Could not set menu button: %s", e)


def _run_uvicorn(web_app, port: int) -> None:
    """Run uvicorn in a dedicated thread with its own event loop."""
    import uvicorn

    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    server = uvicorn.Server(
        uvicorn.Config(web_app, host="0.0.0.0", port=port, log_level="info"),
    )
    loop.run_until_complete(server.serve())


def main() -> None:
    # Menu button (Календарь) and inline Calendar button are disabled; users open the app by link if needed.
    # _set_default_menu_button_webapp()
    app = ApplicationBuilder().token(config.BOT_TOKEN).build()
    register_handlers(app)

    from api.app import app as web_app

    t = threading.Thread(
        target=_run_uvicorn,
        args=(web_app, config.HTTP_PORT),
        daemon=True,
    )
    t.start()

    logger.info("Bot starting (polling)... HTTP API on port %s", config.HTTP_PORT)
    app.run_polling(allowed_updates=["message"])


if __name__ == "__main__":
    main()